FEL2010 - List of Authors (Tanha, M.)

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Tanha, M.

Paper	Title	Page
WEPB05	Conditioning of a New Gun at PITZ Equipped with an Upgraded RF Measurement System	398
	M. Otevrel, G. Asova, J.W. Bähr, M. Hänel, Ye. Ivanisenko, M. Krasilnikov, M. Mahgoub, D.A. Malyutin, A. Oppelt, S. Rimjaem, F. Stephan, M. Tanha, G. Vashchenko, X.H. Wang DESY Zeuthen, Zeuthen A. Brinkmann, K. Flöttmann, D. Reschke DESY, Hamburg M.A. Khojoyan YerPhI, Yerevan J. Saisut Chiang Mai University, Chiang Mai
	A new photocathode electron gun is about to be characterized at PITZ. It is an L-band normal conducting 1.6 copper cell cavity with improved cooling system. It has the same design as the previously installed gun, characterized at PITZ during the run period 2008/9. Due to the particle-free surface cleaning method utilizing dry ice, a significant reduction of the dark current was achieved in case of the previously tested cavity. This effect is also expected for the new gun. To improve the accuracy of the RF power measurement and control, a new in-vacuum directional coupler was installed between the T-combiner combining the two 5 MW arms of the RF source and the input coaxial coupler. The new in-vacuum coupler will provide much more accurate information about the RF power in the gun and will allow applying appropriate control feedback. Consequently improved stability of the gun operation is expected. Tuning and conditioning results of this new gun cavity will be presented as well as the results of the measurements of the gradient and the gun phase measurements using this new coupler. Photoinjector Test Facility at Zeuthen ** S. Rimjaem et al., EPAC 2008, Genoa, Italy.

Paper

Title

Page

WEPB05

Conditioning of a New Gun at PITZ Equipped with an Upgraded RF Measurement System

398

M. Otevrel, G. Asova, J.W. Bähr, M. Hänel, Ye. Ivanisenko, M. Krasilnikov, M. Mahgoub, D.A. Malyutin, A. Oppelt, S. Rimjaem, F. Stephan, M. Tanha, G. Vashchenko, X.H. Wang
DESY Zeuthen, Zeuthen
A. Brinkmann, K. Flöttmann, D. Reschke
DESY, Hamburg
M.A. Khojoyan
YerPhI, Yerevan
J. Saisut
Chiang Mai University, Chiang Mai

A new photocathode electron gun is about to be characterized at PITZ*. It is an L-band normal conducting 1.6 copper cell cavity with improved cooling system. It has the same design as the previously installed gun, characterized at PITZ during the run period 2008/9**. Due to the particle-free surface cleaning method utilizing dry ice, a significant reduction of the dark current was achieved in case of the previously tested cavity. This effect is also expected for the new gun. To improve the accuracy of the RF power measurement and control, a new in-vacuum directional coupler was installed between the T-combiner combining the two 5 MW arms of the RF source and the input coaxial coupler. The new in-vacuum coupler will provide much more accurate information about the RF power in the gun and will allow applying appropriate control feedback. Consequently improved stability of the gun operation is expected. Tuning and conditioning results of this new gun cavity will be presented as well as the results of the measurements of the gradient and the gun phase measurements using this new coupler.

* Photoinjector Test Facility at Zeuthen
** S. Rimjaem et al., EPAC 2008, Genoa, Italy.